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Optoma HD131Xe Projector - Advanced Calibration Information

Posted on December 22, 2013 by 

About this Calibration Information

From Mike, who calibrated the HD131Xe:

This Optoma is just weird.  Some of the CMS adjustments do little or nothing to improve the color (in particular with the primaries).  The problem with red that I found was that flesh tones have too much red in them, even though red objects look undersaturated.  Blue does lean toward cyan (see the CMS chart), but the adjustments don’t help much.  Cyan and magenta are way off in hue (both too blue), but could be adjusted properly for hue, while the saturation control does very little.

I think anyone who buys this should probably forgo the CMS and just adjust color and tint to taste.

Color Management Settings

Color Management Settings (Default is 0)
Red Green Blue Cyan Magenta Yellow
Hue 0 11 0 -32 29 32
Saturation -8 0 0 0 0 0
Gain 14 20 -10 50 5 38

CMS Calibration Notes

The HD131Xe has a full CMS, but it doesn’t have enough range to correct some of the colors that are far off their target in the color gamut.  Red plots the best, and looks decent, by default (see CIE chart).  Blue is not bad, but green is way off.  Cyan and magenta are not bad, but yellow has too much red in it.  With normal viewing, it doesn’t look bad, just a little too red.

Using the CMS, all three secondaries can be improved, but the primaries don’t change much and green in particular really cannot be improved.  Also, when the CMS calibration is done as it should be, skin tones (which are too red to begin with) came out too yellow.  A compromise was reached by adding a little more gain than called for to the red primary, thus improving skin tones.  They’re still not great, but this is a low cost 1080P projector we’re talking about.

Calibration Charts (Before and After)

Click to enlarge these charts, pre- and post-calibration.

Optoma HD131Xe CIE Chart Pre-Calibration

Optoma HD131Xe CIE Chart Post-Calibration (CMS)

Optoma HD131Xe CIE Chart Grayscale

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